Damage­-Based Hysteresis Bouc-­Wen Model for Reinforced Concrete Elements

Abstract:

Hysteresis is observed in various mechanical systems. For structural elements, cyclic loads cause deterioration of their characteristics due to cracks opening, yielding and buckling of metal­lic elements, etc. This contribution presents a smooth hysteresis model for reinforced concrete (RC) structural elements that accounts for both damage and pinching effects. The model is based on the Bouc­-Wen differential equation. Deterioration of the mechanical properties is introduced through a damage index that includes energy dissipation and ductility. Pinching is simulated by acting directlyon the stiffness of the system. The parameters of the model have clear physical meanings, which helps in the identification and interpretation of the results. Applications to RC elements show that the model is suitable for describing complex cyclic behaviours involving effects of damage. Being defined by a smooth hysteresis law, the model is a computationally-­effective tool useful for dynamic and stochastic simulations.

• Periodical: Key Engineering Materials (Volume 919)
• Pages: 178-187
• DOI: https://doi.org/10.4028/p-ps3qy5
• Online since: May 2022
• Authors: Stefano Sirotti, Matteo Pelliciari*, Bruno Briseghella, Angelo Marcello Tarantino
• Keywords: Bouc­-Wen Model, Damage, Hysteresis, Reinforced Concrete

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